Sintering wet fuel sorting method

Abstract

The invention discloses a sintering wet fuel sorting method, which relates to the technical field of bulk powder sorting, and comprises the following steps: obtaining an original wet fuel with the material water content of 7-20% and the particle size of not more than 5mm; if the grading granularity requirement is not less than 0.5 mm, obtaining a coarse material I and a fine material I; if the grading granularity requirement is not greater than 0.15 mm, obtaining a coarse material II and a fine material II; the step S23 specifically comprises the step of obtaining a third coarse material and a third fine material if the grading granularity requirement is 0.15-0.5 mm. According to the sintering wet fuel sorting method, based on the characteristics of the wet fuel and the grading particle size requirement, the sorting method is selected in a self-adaptive mode, and accurate separation can be conducted.

Description

Technical Field

[0001] The invention relates to the technical field of raw material preparation in the iron and steel metallurgical industry, and in particular to a sintering wet fuel sorting method. Background Art

[0002] Solid fuel is one of the main fuels used in the metallurgical sintering process, and is also the main source of carbon emissions in the iron and steel metallurgical industry. The particle size composition of sintered solid fuel is an important parameter that affects the sintering effect. The particle size of fuel coal used in sintering machines is required to be limited to a certain range, and the appropriate particle size is between 0.5 mm and 3 mm. Solid fuel particles that are too coarse or too fine (less than 0.5 mm or greater than 3 mm) will have a significant impact on the fuel utilization efficiency and the performance parameters of sintered ore. Therefore, during the sintering process, it is generally required to control the fuel particle size within the range of 0.5 to 3 mm.

[0003] Wet fine coal particles have the characteristics of high water content, fine particle size, and small difference between particle sizes. They are easily affected by liquid bridge forces, resulting in strong adhesion between particles, which is mainly manifested in small particles adhering to large particles or small particles agglomerating with each other, which seriously affects the screening efficiency. The results of relevant literature show that when the moisture content of the material reaches 10%, the screening efficiency is less than 50%. The existing screening equipment for wet fine particles mainly includes post-screen, chisel screen, string screen, probability screen, etc., but the minimum particle size of the classification is above 3mm. Linear vibrating screen, ultrasonic vibrating screen, etc. are suitable for screening equipment of fine-grained powder materials, requiring the moisture content of the material to be below 7%. Similarly, the wind classification device also requires the moisture content of the material to be below 5%, or even smaller. At present, the mainstream sorting method used for wet materials is wet screening, which consumes a lot of water and is not applicable in all occasions.

[0004] For wet fine coal powder with a moisture content of 7% to 20% and a particle size distribution of 0 to 5 mm, the existing classification process and classification system are difficult to accurately separate. In view of this, it is necessary to propose a sintering wet fuel sorting method to solve or at least partially solve the above technical problems. Summary of the invention

[0005] The sintering wet fuel sorting method provided by the invention solves the technical problem that the existing wet fine coal particle sorting accuracy is low, resulting in low sintering utilization efficiency.

[0006] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0007] A sintering wet fuel sorting method, a sintering wet fuel sorting method, characterized in that it includes the following steps: S10, obtaining original wet fuel, the moisture content of the original wet fuel is 7% to 20%, and the particle size of the original wet fuel is not greater than 5 mm; S20, if the classification particle size requirement is not less than 0.5 mm, then enter step S21; if the classification particle size requirement is not greater than 0.15 mm, then enter step S22; if the classification particle size requirement is 0.15 to 0.5 mm, then enter step S23; step S21 specifically includes: S211, preliminary dispersion and uniform distribution during vibration conveying Spreading; S212, fluidizing and loosening based on normal temperature wind during vibration conveying; S213, breaking up agglomerated materials during vibration conveying based on normal temperature wind; S214, fluidizing and classifying based on normal temperature wind during vibration conveying; separating and obtaining materials not less than 0.5 mm as coarse materials one, and performing gas-solid separation on materials less than 0.5 mm to obtain fine materials one; step S22 specifically includes: S221, preliminary dispersion and uniform spreading during vibration conveying; S222, fluidizing and drying based on hot air during vibration conveying; S223, fluidizing and dispersing based on normal temperature wind during vibration conveying;

[0008] S224, fluidization classification is performed based on normal temperature wind during vibration conveying; S225, secondary classification is performed using a planar spiral airflow method, and materials not less than 0.15 mm are separated as coarse material 2, and gas-solid separation is performed on materials less than 0.15 mm to obtain fine material 2; step S23 specifically includes:

[0009] S231, perform preliminary dispersion and even distribution during the vibration conveying process; S232, perform fluidized drying based on hot air during the vibration conveying process; S233, perform fluidized dispersion during the vibration conveying process based on normal temperature wind; S234, perform fluidized classification during the vibration conveying process based on normal temperature wind; S334, perform secondary classification using gravity classification method, separate and obtain materials with a size of 0.15 to 0.5 mm as coarse material three, and perform gas-solid separation on materials less than 0.15 mm to obtain fine material three.

[0010] Furthermore, the vibration frequency of the vibration conveying is 800 to 1000 times / minute; the beating frequency of the preliminary dispersion is 8000 to 10000 times / minute; the material thickness of the uniform cloth is 30 to 50 mm; the wind temperature of the normal temperature wind is 20 to 30 degrees; and the wind temperature of the hot air is 60 to 80 degrees.

[0011] Further, in step S21, a sintering wet fuel sorting system is used for air sorting, and the sintering wet fuel sorting system includes a sintering fuel sorting device, and the sintering fuel sorting device includes an air sorting feeding mechanism, an air sorting material sorting mechanism and an air sorting air supply mechanism, the air sorting material sorting mechanism has an air sorting material inlet, an air sorting dust outlet and an air sorting discharge outlet, the air sorting feeding mechanism is arranged on the input side of the air sorting material sorting mechanism, the air sorting air supply mechanism is arranged between the air sorting material inlet and the air sorting discharge outlet, the air sorting feeding mechanism is used to feed materials to the air sorting material inlet, the air sorting material sorting mechanism includes an air sorting air sorting air sorting vibration conveying platform, an air sorting vibration conveying platform, an air sorting vibration driving mechanism, an air sorting multi-stage sorting unit, an air sorting wind hood and an air sorting material breaking unit, the air sorting vibration conveying platform is arranged on the air sorting basic frame, the air sorting vibration driving mechanism is used to drive the air sorting vibration conveying platform to vibrate, and the air sorting multi-stage The sorting unit is fixedly arranged on the wind separation vibration conveying platform and is used to convey materials as the wind separation vibration conveying platform vibrates. The wind separation hood cover is arranged on the wind separation basic frame and is enclosed with the wind separation multi-stage sorting unit to form a wind separation working chamber. The wind separation material inlet and the wind separation dust outlet are respectively arranged at the upstream and downstream of the wind separation hood. The wind separation air supply mechanism is arranged below the wind separation multi-stage sorting unit. The wind separation air supply mechanism is used to supply air from the bottom of the wind separation multi-stage sorting unit to the wind separation working chamber. The wind separation cloth breaking unit is used to drive the head of the wind separation multi-stage sorting unit to vibrate so that the water-containing agglomerated material at the head is dispersed by vibration. The dispersed material after vibration dispersion is vibrated and conveyed on the surface of the wind separation multi-stage sorting unit and is wind-selected in the wind separation working chamber. The dust material after wind separation is output through the wind separation dust outlet, and the particulate material after wind separation is output to the outside of the wind separation working chamber through the tail of the wind separation multi-stage sorting unit.

[0012] Furthermore, the air separation multi-stage sorting unit includes an air separation material scattering feed assembly, an air separation primary sorting feed assembly, an air separation secondary sorting feed assembly and an air separation tertiary sorting discharge assembly which are sequentially arranged along the conveying direction; the air separation material scattering feed assembly, the air separation primary sorting feed assembly, the air separation secondary sorting feed assembly and the air separation tertiary sorting discharge assembly are all fixedly arranged on an air separation vibration conveying platform; the air separation material inlet is above the air separation material scattering feed assembly and is on the input side of the air separation material scattering feed assembly; the air separation material scattering unit includes an air separation material conveying plate and an air separation conveying scattering plate which are sequentially arranged along the conveying direction; the air separation material inlet is above the air separation material conveying plate; the air separation conveying scattering plate is arranged downwardly inclined along the conveying direction between the air separation material conveying plate and the air separation secondary sorting feed assembly; the air separation material scattering unit is used to drive the air separation conveying scattering plate to vibrate from the back of the air separation conveying scattering plate.

[0013] Furthermore, the first-level air distribution plate for air selection includes an air selection hood and an upper air selection plate and a lower air selection plate arranged at intervals along the height direction. The air selection hood is fixedly set between the upper air selection plate and the lower air selection plate, and multiple air selection hoods are arranged in an array. The air selection hood includes a coaxially arranged air selection air inlet section, an air selection frustum section and an air selection circular ring section. The air selection air inlet section is provided with axially penetrating air inlet holes, the air selection frustum section is provided with an annular uniform flow chamber arranged in an annular shape, the air selection circular ring section is provided with an annular air outlet chamber, the top surface of the air selection circular ring section is provided with air outlet holes connected to the annular air outlet chamber, and multiple air outlet holes are arranged at intervals along the circumference of the air selection circular ring section, and the air inlet holes, the annular uniform flow chamber and the circular air outlet chamber are connected to each other.

[0014] Furthermore, the air separation secondary sorting and feeding assembly includes air separation secondary air distribution plates and air separation secondary rectifying grids which are sequentially arranged along the conveying direction; the air separation secondary rectifying grids are arranged downwardly inclined along the conveying direction between the air separation secondary air distribution plates and the air separation tertiary sorting and discharging assembly; the air separation tertiary sorting and discharging assembly includes air separation tertiary air distribution plates and air separation discharging conveying plates which are sequentially arranged along the conveying direction; the air separation discharging conveying plates are located downstream of the air separation tertiary air distribution plates and extend out of the air separation working chamber.

[0015] Furthermore, in step S22, a first sintering wet fuel screening system is used for air separation, and the first sintering wet fuel screening system includes a first sintering wet fuel screening device and a heater, and the heater is used to provide hot air for the sintering wet fuel screening device.

[0016] Furthermore, in step S23, a second sintering wet fuel screening system is used for air separation, and the second sintering wet fuel screening system includes a second sintering wet fuel screening device and a heater, and the heater is used to provide hot air for the second sintering wet fuel screening device.

[0017] Furthermore, the first sintering wet fuel screening device includes a first screening bulk material distribution unit, a first level screening unit, a first level screening unit, a first level screening unit and a first wind hood which are sequentially distributed along the conveying direction. The first screening bulk material distribution unit has a first inclined downward conveying plate, a first vibrator is arranged on the back of the first inclined downward conveying plate, a first level hot air chamber is arranged at the bottom of the first level screening unit, a first level air selection baffle assembly is arranged at the top of the first level screening unit, a first level normal temperature chamber is arranged at the bottom of the first level screening unit, a first level baffle plate assembly is arranged at the top of the first level screening unit, a first level normal temperature chamber is arranged at the bottom of the first level screening unit, a first level normal temperature chamber is arranged at the bottom of the first level screening unit, a powder selection blade assembly is arranged on the top first wind hood of the first level screening unit.

[0018] Furthermore, the second sintering wet fuel screening device includes a second screening bulk material distribution unit, a second-level screening unit, a second-level screening unit, a second-level screening unit and a second wind hood which are sequentially distributed along the conveying direction. The second screening bulk material distribution unit has a second downward inclined conveying plate, a second vibrator is arranged on the back of the second downward inclined conveying plate, a second-level hot air chamber is arranged at the bottom of the second-level screening unit, a second air selection first-level material baffle assembly is arranged at the top of the second-level screening unit, a second-level normal temperature chamber is arranged at the bottom of the second-level screening unit, a second-level material baffle plate assembly is arranged at the top of the second-level screening unit, a second-level normal temperature chamber is arranged at the bottom of the second-level screening unit, and a grading impeller assembly is arranged on the second wind hood at the top of the second-level screening unit.

[0019] The present invention has the following beneficial effects:

[0020] The sintering wet fuel sorting method of the present invention adaptively selects a grading process according to a grading particle size requirement; if the grading particle size requirement is not less than 0.5 mm, then during the vibration conveying process, the material is sorted by beating for preliminary dispersion and uniform distribution, fluidization and loosening by normal temperature wind, breaking up agglomerated materials, and fluidization classification, and a process of separating and obtaining a coarse material one and a fine material one; if the grading particle size requirement is less than 0.15 mm, then during the vibration conveying process, the material is sorted by beating for preliminary dispersion and uniform distribution, fluidization and loosening by hot air, breaking up agglomerated materials, and fluidization classification, and a process of plane spiral airflow, and a coarse material two and a fine material two are separated; if the grading particle size requirement is 0.15 to 0.5 mm, then during the vibration conveying process, the material is sorted by beating for preliminary dispersion and uniform distribution, fluidization and loosening by hot air, breaking up agglomerated materials, and fluidization classification, and a gravity classification, and a coarse material three and a fine material two are separated. The sintering wet fuel sorting method provided by the present invention can perform accurate separation by adaptively selecting a sorting method based on the characteristics of the wet fuel and the requirements for graded particle size.

[0021] In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be further described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention.

[0023] In the attached figure:

[0024] Figure 1 is a schematic flow chart of a sintering wet fuel sorting method in one embodiment of the present invention;

[0025] Figure 2 is a schematic structural diagram of a sintering wet fuel sorting system in one embodiment of the present invention;

[0026] Figure 3 yes Figure 2 Structural schematic diagram of the sintering fuel separation device;

[0027] Figure 4 is a schematic structural diagram of a first sintered wet fuel screening system in another embodiment of the present invention;

[0028] Figure 5 yes Figure 4 A schematic diagram of the structure of the first sintering wet fuel screening device;

[0029] Figure 6 is a schematic structural diagram of a second sintered wet fuel screening device in another embodiment of the present invention;

[0030] Figure 7 is a schematic structural diagram of a sintering fuel separation device in another embodiment of the present invention;

[0031] Figure 8 yes Figure 7 The enlarged view of point A in the middle;

[0032] Fig. 9 yes Figure 7 A schematic diagram of the structure of the first-level air distribution plate of the air selection;

[0033] Fig.10 yes Fig. 9 Schematic diagram of the three-dimensional structure of the wind cap of the middle stroke selection;

[0034] Fig.11 yes Fig. 9 A schematic diagram of the structure of the air separation material distribution and conveying assembly;

[0035] Fig.12 yes Figure 7 A schematic diagram of the three-dimensional structure of the first-level wind separation material blocking component;

[0036] Fig.13 yes Figure 7 Schematic diagram of the planar structure of the first-level air separation material retaining assembly.

[0037] Legend:

[0038] 100. Sintering fuel sorting device; 10. Air separation feeding mechanism; 11. Material bin; 12. Round roller distributor; 13. Opening regulator; 20. Air separation distribution and sorting mechanism; 201. Air separation material inlet;

[0039] 202, wind separation dust outlet; 203, wind separation discharge outlet; 21, wind separation wind separation vibration conveying platform;

[0040] 22. Wind selection vibration conveyor platform; 23. Wind selection vibration drive mechanism; 24. Wind selection multi-stage sorting unit;

[0041] 241, pneumatic material separation and scattering conveying assembly; 2411, pneumatic material separation conveying plate; 2412, pneumatic conveying and scattering plate; 242, pneumatic first-stage separation and conveying assembly; 2421, pneumatic first-stage air distribution plate; 24211, pneumatic hood; 2422, pneumatic first-stage rectifying grid; 243, pneumatic second-stage separation and conveying assembly; 2431, pneumatic second-stage air distribution plate; 2432, pneumatic second-stage rectifying grid; 244, pneumatic third-stage separation and discharging assembly; 2441, pneumatic third-stage air distribution plate; 2442, pneumatic discharging conveying plate; 25, pneumatic hood; 2 51. upper air selection cover; 252. lower air selection cover; 253. air selection baffle scattering unit; 2531. first air selection material baffle assembly; 25311. first hoisting hanging rod; 25312. first hoisting frame; 25313. first wind baffle; 25314. second wind baffle; 25315. window adjustment member; 2532. second air selection material baffle assembly; 26. air selection material scattering unit; 27. air selection material guide and discharge mechanism; 271. air selection material guide and discharge box;

[0042] 30. Air supply mechanism for air selection; 31. First-stage air supply box for air selection; 32. Second-stage air supply box for air selection; 33. Third-stage air supply box for air selection; 34. Air supply branch pipe; 35. Air supply main pipe; 36. Blower; 37. Flow control valve;

[0043] 200, first sintering wet fuel screening device; 210, first screening bulk material distribution unit; 220, first primary screening unit; 230, first secondary screening unit; 240, first tertiary screening unit; 250, first wind hood; 260, powder selection blade assembly; 400, heater;

[0044] 300, second sintering wet fuel screening device; 210, second screening bulk material distribution unit; 220, second primary screening unit; 330, second secondary screening unit; 340, second tertiary screening unit; 350, second wind hood; 360, grading impeller assembly. DETAILED DESCRIPTION

[0045] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0046] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0048] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0049] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 , Fig.11 , Fig.12 as well as Fig.13As shown, a sintering wet fuel sorting method provided by the present invention comprises the following steps: S10, obtaining original wet fuel, the moisture content of the original wet fuel is 7% to 20%, and the particle size of the original wet fuel is not greater than 5 mm; S20, if the classification particle size requirement is not less than 0.5 mm, then entering step S21; if the classification particle size requirement is not greater than 0.15 mm, then entering step S22; if the classification particle size requirement is 0.15 to 0.5 mm, then entering step S23, step Step S21 specifically includes: S211, preliminary dispersion and uniform distribution during vibration conveying; S212, fluidization loosening based on normal temperature wind during vibration conveying; S213, breaking up agglomerated materials during vibration conveying based on normal temperature wind; S214, fluidization classification based on normal temperature wind during vibration conveying; separation and acquisition of materials not less than 0.5 mm as coarse material 1, gas-solid separation of materials less than 0.5 mm to obtain fine material 1; Step S22 specifically includes: S221, During the vibration conveying process, preliminary dispersion and uniform distribution are carried out; S222, based on hot air and fluidized drying during the vibration conveying process; S223, based on normal temperature wind, fluidized dispersion during the vibration conveying process; S224, based on normal temperature wind, fluidized classification during the vibration conveying process; S225, secondary classification is carried out using a planar spiral airflow method, and materials not less than 0.15 mm are separated as coarse material two, and materials less than 0.15 mm are subjected to gas-solid separation to obtain fine material two; step S23 specifically includes: S231, preliminary dispersion and uniform distribution during the vibration conveying process; S232, based on hot air and fluidized drying during the vibration conveying process; S233, based on normal temperature wind, fluidized dispersion during the vibration conveying process; S234, based on normal temperature wind, fluidized classification during the vibration conveying process; S334, secondary classification is carried out using a gravity classification method, and materials of 0.15 to 0.5 mm are separated as coarse material three, and materials less than 0.15 mm are subjected to gas-solid separation to obtain fine material three.

[0050] The present invention provides a sintering wet fuel sorting method, which adaptively selects a grading process according to a grading particle size requirement; if the grading particle size requirement is not less than 0.5 mm, then during the vibration conveying process, the material is sorted by beating for preliminary dispersion and uniform distribution, fluidization and loosening by normal temperature wind, breaking up agglomerated materials, and fluidization classification, and a process of separating and obtaining a coarse material one and a fine material one; if the grading particle size requirement is less than 0.15 mm, then during the vibration conveying process, the material is sorted by beating for preliminary dispersion and uniform distribution, fluidization and loosening by hot air, breaking up agglomerated materials, and fluidization classification, and a process of plane spiral airflow, and a coarse material two and a fine material two are separated; if the grading particle size requirement is 0.15 to 0.5 mm, then during the vibration conveying process, the material is sorted by beating for preliminary dispersion and uniform distribution, fluidization and loosening by hot air, breaking up agglomerated materials, and fluidization classification, and a gravity classification, and a coarse material three and a fine material two are separated. The sintering wet fuel sorting method provided by the present invention can perform accurate separation by adaptively selecting a sorting method based on the characteristics of the wet fuel and the requirements for graded particle size.

[0051] Furthermore, the vibration frequency of the vibration conveying is 800 to 1000 times / minute; the beating frequency of the preliminary dispersion is 8000 to 10000 times / minute; the material thickness of the uniform cloth is 30 to 50 mm; the wind temperature of the normal temperature wind is 20 to 30 degrees; and the wind temperature of the hot air is 60 to 80 degrees.

[0052] Please refer to Figure 2 and Figure 3Further, in step S21, a sintering wet fuel sorting system is used for air sorting, and the sintering wet fuel sorting system includes a sintering fuel sorting device 100, including an air sorting feeding mechanism 10, an air sorting material sorting mechanism 20 and an air sorting air supply mechanism 30, the air sorting material sorting mechanism 20 has an air sorting material inlet 201, an air sorting dust outlet 202 and an air sorting discharge outlet 203, the air sorting feeding mechanism 10 is arranged on the input side of the air sorting material sorting mechanism 20, and the air sorting air supply mechanism 30 is arranged Between the air separation material inlet 201 and the air separation discharge outlet 203, the air separation feeding mechanism 10 is used to feed the material to the air separation material inlet 201, and the air separation material sorting mechanism 20 includes an air separation air separation air separation vibration conveying platform 21, an air separation vibration conveying platform 22, an air separation vibration driving mechanism 23, an air separation multi-stage sorting unit 24, an air separation wind cover 25 and an air separation material scattering unit 26. The air separation vibration conveying platform 22 is arranged on the air separation base frame, and the air separation vibration driving mechanism 23 is used to drive the air separation vibration conveying platform 21. 2 vibration, the wind selection multi-stage sorting unit 24 is fixedly arranged on the wind selection vibration conveying platform 22 for conveying materials with the wind selection vibration conveying platform 22 vibrating, the wind selection hood 25 is covered on the wind selection base frame and enclosed with the wind selection multi-stage sorting unit 24 to form a wind selection working chamber, the wind selection material inlet 201 and the wind selection dust outlet are respectively arranged at the upstream and downstream of the wind selection hood 25, and the wind selection air supply mechanism 30 is arranged below the wind selection multi-stage sorting unit 24. The wind selection air supply mechanism 30 is used to The lower part of the sorting unit 24 supplies air into the air sorting working chamber, and the air sorting material breaking unit 26 is used to drive the head of the air sorting multi-stage sorting unit 24 to vibrate so that the water-containing agglomerated materials at the head are dispersed by vibration. The dispersed materials after vibration dispersion are vibrated and transported on the surface of the air sorting multi-stage sorting unit 24 and are air sorted in the air sorting working chamber. The air sorted dust materials are output through the air sorting dust output port 202, and the air sorted granular materials are output to the outside of the air sorting working chamber through the tail of the air sorting multi-stage sorting unit 24.

[0053] The sintering fuel sorting device 100 includes an air selection feeding mechanism 10, an air selection material sorting mechanism 20 and an air selection air supply mechanism 30. The air selection material sorting mechanism 20 has an air selection material inlet 201, an air selection dust outlet 202 and an air selection discharge outlet 203. The air selection material sorting mechanism 20 includes an air selection air selection air selection vibration conveying platform 21, an air selection vibration conveying platform 22, an air selection vibration driving mechanism 23, an air selection multi-stage sorting unit 24, an air selection wind cover 25 and an air selection material scattering unit 26. The sintering wet fuel enters the air selection multi-stage sorting unit 24 from the air selection material inlet 201, and the air selection vibration driving mechanism 23 drives the air selection vibration conveying platform 22 and the air selection multi-stage sorting unit 24 to separate the wet fuel from the wet fuel. The sorting unit 24 vibrates synchronously, and fluidized sorting is carried out under the action of the air supply mechanism 30 that supplies air from the bottom of the air separation multi-stage sorting unit 24. The air separation material dispersing unit 26 is used to drive the head of the air separation multi-stage sorting unit 24 to vibrate so that the water-containing agglomerated material at the head is dispersed by vibration. The dispersed material after vibration dispersion is vibrated and transported on the surface of the air separation multi-stage sorting unit 24 and undergoes multi-stage air separation in the air separation working chamber. The air-separated dust material is output through the air separation dust output port 202, and the air-separated granular material is output to the outside of the air separation working chamber through the tail of the air separation multi-stage sorting unit 24, thereby solving the technical problem that the existing fuel sorting device has poor sorting efficiency for sintering wet fuel.

[0054] The sintering fuel sorting device provided by the present invention can fully separate materials smaller than 0.5 mm in the sintering wet fuel, solving the technical problem that the existing original fuel is directly added to the sintering production without any treatment after being crushed, resulting in excessive particles smaller than 0.5 mm and low sintering efficiency.

[0055] It can be understood that the air separation vibration drive mechanism 23 can be a centrifugal drive machine, a connecting rod drive machine, or an ordinary vibration motor, as long as the air separation vibration drive mechanism 23 drives the air separation vibration conveying platform 22 to reciprocate and then drives the air separation multi-stage sorting unit 24 to transport materials.

[0056] It can be understood that in the present invention, the air separation vibration conveying platform 22 can be movably arranged relative to the air separation vibration conveying platform 21 by arranging a return spring between the air separation vibration conveying platform 22 and the air separation vibration conveying platform 21.

[0057] Please refer to Figure 3 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 , Fig.11 , Fig.12 as well as Fig.13Furthermore, the wind selection multi-stage sorting unit 24 includes a wind selection cloth scattering feeding component 241, a wind selection primary sorting feeding component 242, a wind selection secondary sorting feeding component 243 and a wind selection tertiary sorting discharging component 244 which are sequentially arranged along the conveying direction. The wind selection cloth scattering feeding component 241, the wind selection primary sorting feeding component 242, the wind selection secondary sorting feeding component 243 and the wind selection tertiary sorting discharging component 244 are all fixedly arranged on the wind selection vibration conveying platform 22, and the wind selection material inlet 201 is located above the wind selection cloth scattering feeding component 241. The pneumatic material scattering unit 26 is located at the input side of the pneumatic material scattering feeding assembly 241, and the pneumatic material scattering unit includes a pneumatic material conveying plate 2411 and a pneumatic conveying scattering plate 2412 arranged in sequence along the conveying direction. The pneumatic material inlet 201 is located above the pneumatic material conveying plate 2411, and the pneumatic conveying scattering plate 2412 is arranged between the pneumatic material conveying plate 2411 and the pneumatic secondary sorting feeding assembly in a downwardly inclined manner along the conveying direction. The pneumatic material scattering unit 26 is used to drive the pneumatic conveying scattering plate 2412 to vibrate from the back side of the pneumatic conveying scattering plate 2412. It can be understood that in the solution of the present invention, the pneumatic material conveying plate 2411 is arranged horizontally, and the pneumatic material conveying plate 2411 and the pneumatic conveying scattering plate 2412 are both blind plates. In specific implementation, the sorting process includes breaking up agglomerated materials, fluidized stratification, precise grading, vibration transmission, etc. The breaking up of agglomerated materials is mainly achieved by the action of the air separation cloth breaking up and feeding component 241, the fluidized stratification is mainly achieved by the air separation first-stage sorting feeding component 242, the air separation second-stage sorting feeding component 243 and / or the air separation baffle breaking up unit 253 under the action of wind, and the precise grading is mainly achieved by the air separation third-stage sorting discharging component 244 under the action of wind.

[0058] Furthermore, the air separation material beating unit includes a beating bracket, a beating vibrator and a beating driver. The beating driver is fixed on the air separation vibration conveying platform 21. The beating bracket is fixed on the air separation vibration conveying platform 22. The first end of the beating vibrator is fixed on the beating bracket and is electrically connected to the beating driver. The second end of the beating driver rod is arranged from the back side of the air separation conveying beating plate 2412 toward the air separation conveying beating plate 2412.

[0059] Furthermore, the striking driving rods are arranged in a direction perpendicular to the air separation conveying and scattering plate 2412 , and a plurality of striking driving rods are arranged at intervals along the width direction of the air separation conveying and scattering plate 2412 .

[0060] Preferably, the striking vibrating rod drives the air separation conveying and dispersing plate 2412 to generate high-frequency vibration. By arranging the air separation material dispersing unit, during the material conveying operation, the material reaching the air separation conveying and dispersing plate 2412 can improve the uniformity of material layer distribution under the high-frequency resonance of the vibrating rod, and can also achieve preliminary vibration separation of agglomerated materials.

[0061] Furthermore, the first-level air separation sorting and feeding assembly includes a first-level air separation air distribution plate 2421 and a first-level air separation rectifying grille 2422 which are arranged in sequence along the conveying direction. The first-level air separation air distribution plate 2421 is arranged horizontally, and the first-level air separation rectifying grille 2422 is arranged downwardly inclined along the conveying direction between the first-level air separation air distribution plate 2421 and the second-level air separation sorting and feeding assembly 243. The first-level air separation air distribution plate is a double-layer perforated plate.

[0062] Further, the first-level air distribution plate 2421 for air selection includes an air selection cap 24211 and an air selection upper plate and an air selection lower plate arranged at intervals in the height direction. The air selection cap 24211 is fixedly arranged between the air selection upper plate and the air selection lower plate. A plurality of air selection caps 24211 are arranged in an array. The air selection cap 24211 includes a coaxially arranged air selection air inlet section, an air selection frustum section (diffusion section) and an air selection annular section (flow equalization section). The air selection air inlet section is provided with an axially penetrating air inlet hole, the air selection frustum section is provided with an annular flow equalization chamber arranged in an annular shape, the air selection annular section is provided with an annular air outlet chamber, the top surface of the air selection annular section is provided with an air outlet hole connected to the annular air outlet chamber, a plurality of air outlet holes are arranged at intervals along the circumference of the air selection annular section, and the air inlet hole, the annular flow equalization chamber and the annular air outlet chamber are connected to each other. More preferably, the air outlet hole is arranged axially outwardly inclined. In a specific embodiment of the present invention, 8 air outlet holes are provided.

[0063] Furthermore, it also includes layer fastening connectors, the upper layer plate and the lower layer plate of the air separation are arranged at intervals and fixed by the layer fastening connectors, the top of the air separation hood 24211 is assembled on the upper layer plate of the air separation by interference fit, and the bottom of the air separation hood 24211 is assembled on the lower layer plate of the air separation by interference fit. During specific operation, the air separation hood 24211 is embedded between the air separation upper plate and the air separation lower plate. The normal temperature air in the first-level air supply chamber enters the air separation hood 24211 from the air inlet, passes through the diffusion section and the equal flow section in turn, and is evenly divided into 8 winds to act on the material layer through the air outlet. The air separation hood 24211 does not need to extend into the interior of the material layer. It is more suitable for thin material layers than the existing air separation hood 24211. It can not only enhance the jet speed when acting on the material and prevent the occurrence of blind spots in the jet action, but also the slightly inclined angle of the air outlet can enhance the collision between materials in the action area of ​​the first-level air distribution plate 2421 of the air separation, thereby further promoting the separation of agglomerated materials. In addition, compared with the traditional straight-hole air distribution plate, the resistance of the double-layer porous air distribution plate will not be too different.

[0064] Further, the air-selection secondary sorting feeding assembly includes an air-selection secondary air distribution plate 2431 and an air-selection secondary rectifying grid 2432 arranged in sequence along the conveying direction, and the air-selection secondary rectifying grid 2432 is arranged downwardly along the conveying direction between the air-selection secondary air distribution plate 2431 and the air-selection tertiary sorting discharging assembly 244. Preferably, the air-selection secondary air distribution plate 2431 is arranged horizontally.

[0065] Furthermore, the three-stage air separation and sorting discharge component 244 includes a three-stage air separation air distribution plate 2441 and an air separation discharge conveying plate 2442 arranged in sequence along the conveying direction. The air separation discharge conveying plate 2442 is located downstream of the three-stage air separation air distribution plate 2441 and extends out of the air separation working chamber.

[0066] Furthermore, it also includes a pneumatic material guiding and discharging mechanism 27, which includes a pneumatic material guiding and discharging box 271 arranged at the output end of the pneumatic multi-stage sorting unit 24, and the granular materials after pneumatic selection are output to the pneumatic material guiding and discharging box 271 outside the pneumatic working chamber through the tail of the pneumatic multi-stage sorting unit 24, and the pneumatic material guiding and discharging box 271 has a downwardly arranged particle outlet, and an air-locking discharge valve is arranged at the position of the particle outlet. In specific implementation, the pneumatic material guiding and discharging box 271 is arranged on the pneumatic hood 25 and covers the extended end of the pneumatic discharging conveying plate 2442.

[0067] Furthermore, the wind selection hood 25 includes an upper wind selection hood 251, a lower wind selection hood 252 and a wind selection baffle scattering unit 253. The lower wind selection hood 252 is fixedly arranged on the wind selection vibration conveying platform 22 and is covered outside the wind selection multi-stage sorting unit 24. The upper wind selection hood 251 is fixedly arranged on the wind selection base frame and pressed on the lower wind selection hood 252. The upper wind selection hood 251 and the lower wind selection hood 252 are sealed and connected by a corrugated rubber sleeve. The upper cover 251 and the lower cover 252 for air selection are enclosed with the air selection multi-stage sorting unit 24 to form an air selection working chamber. The air selection baffle scattering unit 253 is arranged on the upper cover 251 for air selection and is located in the air selection working chamber. The air selection baffle scattering unit 253 includes a first-level air selection blocking component 2531 arranged above the first-level air selection feeding component and a second-level air selection blocking component 2532 located above the second-level air selection feeding component 243. In the scheme of the present invention, the air selection hood 25 includes an upper cover 251 for air selection and a lower cover 252 for air selection. The lower cover 252 for air selection vibrates with the air selection vibration conveying platform 22 to avoid leakage during feeding. The sealing cover of the upper cover 251 for air selection is arranged on the lower cover 252 for air selection to ensure air selection performance. At the same time, the air selection baffle scattering unit 253 is arranged on the upper cover 251 for air selection, which can not only crush the rising materials, but also does not vibrate itself.

[0068] Furthermore, the air selection first-level material blocking assembly 2531 includes a first hanging rod 25311, a first hanging frame 25312, and a first wind shield 25313 arranged at intervals on the first hanging frame 25312 in the height direction, a second wind shield 25314 is arranged between two adjacent first wind shields 25313, the first wind guide plate and the second wind guide plate are both arranged on the side wall surface of the first hanging frame, the first wind shield 25313 and the second wind shield 25314 are arranged at intervals, the first wind shield 25313 includes a first window leaf support rail, a first wind guide window leaf and a first fixed block, the two side wall surfaces of the first hanging frame 25312 are respectively provided with a first window leaf support rail and a first fixed block, the first window leaf support rail is movably arranged on the side wall surface of the first hanging frame 25312, the first fixed block is fixedly arranged on the side wall surface of the first frame and is below the first window leaf support rail, and the upper side of the first wind guide window leaf is mounted on two relatively arranged The first window leaf support rail is hingedly arranged between the two window leaf support rails, the lower side of the first wind guide window leaf is supported on the two first fixed blocks, and the first wind guide window leaf is arranged on the corresponding first fixed block along the first oblique direction. The second wind shield 25314 includes a second window leaf support rail, a second wind guide window leaf and a second fixed block. The second window leaf support rail and the second fixed block are respectively arranged on the two side walls of the second hanging frame. The second window leaf support rail is movably arranged on the side wall of the second hanging frame, and the second fixed block is fixedly arranged on the side wall of the second frame and is below the second window leaf support rail. The upper side of the second wind guide window leaf is mounted between the two relatively arranged second window leaf support rails and is hingedly arranged. The lower side of the second wind guide window leaf is supported on the two second fixed blocks. The second wind guide window leaf is arranged on the corresponding second fixed blocks along the second oblique direction, and the second oblique direction is opposite to the first oblique direction. It also includes a window adjustment member 25315 for driving the first window leaf support rail and / or the second window leaf support rail to slide and position.

[0069] In the solution of the present invention, the inclination angle of the first air guide window leaf can be changed when the first window leaf support rail is driven to slide by the window adjustment member 25315, and the inclination angle of the second air guide window leaf can be changed when the second window leaf support rail is driven to slide by the window adjustment member 25315.

[0070] Optionally, the window adjustment member 25315 adopts a hydraulic push rod. In a specific embodiment, the window adjustment member 25315 includes a first hydraulic push rod, a second hydraulic push rod and a movable connecting rod, wherein the first hydraulic push rod is arranged above the uppermost first wind deflector 25313, and the second hydraulic push rod is arranged below the lowermost first wind deflector 25313, and the two ends of the movable connecting rod are respectively movably connected to the movable ends of the first hydraulic push rod and the second hydraulic push rod, and the middle part of the movable connecting rod is movably connected to the first window leaf support rail and the second window leaf support rail, and the fixed ends of the first hydraulic push rod and the second hydraulic push rod are respectively installed on the side wall surface of the first hanging frame 25312, so that the movable connecting rod is driven to swing through the telescopic activity of the first hydraulic push rod and / or the second hydraulic push rod, thereby driving the first window leaf support rail and the second window leaf support rail to slide, and finally adjusting the inclination angle of the first wind guide window leaf and the second wind guide window leaf.

[0071] In the solution of the present invention, the structure of the second-stage air separation material blocking component 2532 is the same as the structure of the first-stage air separation material blocking component 2531.

[0072] In a preferred embodiment, the first hanging rod 25311 is a telescopic adjustment rod, and by setting the first hanging rod 25311 as a telescopic adjustment rod, the height between the first-level wind selection blocking assembly 2531 and the first-level wind selection air distribution plate 2421 can be adjusted; further, the second-level wind selection blocking assembly 2532 is adjustable relative to the height of the second-level wind selection air distribution plate 2431. When in use, the installation height of the first-level wind selection blocking assembly 2531 and the installation height of the second-level wind selection blocking assembly 2532 can be adjusted respectively according to the required sorting effect.

[0073] It can be understood that, in specific implementation, the primary material baffle assembly 251 is composed of the first hanging frame 25312, the first windshield 25313 (a first-layer material baffle group), the second windshield 25314 (a second-layer material baffle group), the first windshield 25312 (a third-layer material baffle group), a fixing block, and a window adjustment member 25315. The first hanging frame 25312 is directly fixed to the air separation upper cover 251 via the first hanging hanging rod 25311, the first-layer material baffle group, the second-layer material baffle group, and the third-layer material baffle group are respectively arranged in the first hanging frame 25312, and the air separation primary material baffle assembly 2531 does not participate in the vibration of the main system. The baffle plate assembly includes three layers of baffle plate groups, which are staggered from bottom to top. On the one hand, they are used to further provide impact force for the material impacted by the jet, and the larger the particle size of the material acting on the baffle plate group, the greater the impact force on the material, thereby promoting the separation of agglomerated materials. On the other hand, when the inertia of the material under the impact of the jet is greater than the resistance of a layer of baffle plate group, the material will pass through a layer of baffle plate group and move upward. The setting of the three-layer baffle plate group can ensure that materials of each particle size can fall back to the upper part of the first-level air distribution plate 2421 of the air separation under the action of resistance, thereby preventing the material from being sucked away by the negative pressure of the dust removal port (air separation dust output port 202).

[0074] Furthermore, the air selection air supply mechanism 30 includes a first-stage air selection air supply box 31, a second-stage air selection air supply box 32, a third-stage air selection air supply box 33, an air supply branch pipe 34, an air supply main pipe 35 and a blower 36. The first-stage air selection air supply box 31, the second-stage air selection air supply box 32 and the third-stage air selection air supply box 33 are connected to the air outlet end of the air supply main pipe 35 through the corresponding air supply branch pipe 34, and the air inlet end of the air supply main pipe 35 is connected to the blower 36. 33 are flexibly connected to the air separation vibration conveying platform 22 respectively, the air separation first-level air supply box 31 is located below the air separation first-level sorting and feeding assembly 242 and has a first-level air supply chamber for blowing air to the air separation first-level sorting and feeding assembly 242, the air separation second-level air supply box 32 is located below the air separation second-level sorting and feeding assembly 243 and has a second-level air supply chamber for blowing air to the air separation second-level sorting and feeding assembly 243, and the air separation third-level air supply box 33 is located below the third-level sorting and feeding assembly and has a third-level air supply chamber for blowing air to the third-level sorting and feeding assembly.

[0075] Furthermore, ash unloading valves are arranged at the bottoms of the first-stage air supply box 31 , the second-stage air supply box 32 and the third-stage air supply box 33 , and a flow regulating valve 37 is arranged on the air supply branch pipe 34 .

[0076] Furthermore, the air separation feeding mechanism 10 includes a silo 11, a round roller distributor 12 and an opening regulator 13. The bottom of the silo 11 has an air separation discharge outlet 203. The opening regulator 13 is arranged upstream of the round roller distributor 12 to adjust the amount of material entering the round roller distributor 12.

[0077] The present invention provides a specific sintering fuel sorting device as follows:

[0078] The air selection material distribution conveying plate 2411 and the air selection conveying and breaking up plate 2412 are blind plates without holes. The back of the air selection conveying and breaking up plate 2412 is provided with a vibrating rod mounting hole. The first-level air distribution plate 2421 for air selection is a double-layer porous air distribution plate. The second-level air distribution plate 2431 and the third-level air distribution plate 2441 for air selection are single-layer porous air distribution plates. The first-level air selection rectifying grid 2422 and the second-level air selection rectifying grid 2432 for air selection are blind plates without holes, and staggered material distribution grids are provided on them. The air separation material distribution conveying plate 2411, the air separation conveying and dispersing plate 2412, the air separation first-level air distribution plate 2421, the air separation first-level rectifying grille 2422, the air separation second-level air distribution plate 2431, the air separation second-level rectifying grille 2432, the air separation third-level air distribution plate 2441, and the air separation discharge conveying plate 2442 are welded to the air separation vibration conveying platform 22, and are supported by a support frame. Soft connections are adopted between the air separation vibration conveying platform 22 and the air separation upper cover 251 and the lower air chamber (first-level air supply chamber, second-level air supply chamber and third-level air supply chamber). The vibration motor is connected to the air separation vibration conveying platform 22 by bolts. During operation, only the middle part vibrates, so as to reduce the vibration load of the system. A vibrating rod mounting bracket (striking bracket) is welded to the lower part of the air selection conveying and dispersing plate 2412. The upper part of the striking vibrating rod is fixed to the air selection conveying and dispersing plate 2412 through the striking bracket, and the lower part is connected to the cable. The striking bracket, the striking vibrating rod and the air selection conveying and dispersing plate 2412 participate in the system vibration together. A first hanging frame 25312 is arranged at the corresponding position of the air selection upper cover 251. The air selection first-level material blocking assembly 2531 is not connected to the air selection vibration conveying platform 22 and does not participate in the system vibration. The air chamber includes a first-level air supply chamber, a second-level air supply chamber and a third-level air supply chamber. The upper part is sealed and connected to the first-level air distribution plate 2421, the second-level air distribution plate 2431 and the third-level air distribution plate 2441 of the air selection, respectively. The lower part is connected to the first-level air supply branch pipe 34, the second-level air supply branch pipe 34 and the third-level air supply branch pipe 34, respectively. Each air chamber is provided with a guide plate assembly to ensure the uniformity of wind speed distribution in each area of ​​the air distribution plate. At the same time, since the various parts of the sorting system have different requirements for wind speed, each air supply branch pipe 34 is provided with a flow regulating valve 37, which can adjust the wind speed of each air distribution plate according to the requirements. In addition, considering that the air distribution plate may dump during operation, each air chamber is provided with an ash discharge port at the bottom to facilitate emptying the dumped material from the air distribution hole, so as to ensure the normal operation of the air supply system.

[0079] The specific use process of the sintering fuel separation device provided by the present invention is as follows:

[0080] When the material reaches the first-level air distribution plate 2421 of the air separation, the material layer is blown upward and fluidized quickly under the dual effects of the high-frequency excitation of the vibration motor and the impact of the microporous high-speed jet on the double-layer porous air distribution plate (the outlet jet speed is about 30ˉ35m / s). The impact of the high-speed jet will cause the fine particles adhering to the large particles and the small particles gathered together to be initially separated under the action of the liquid bridge force. At the same time, a first-level air separation baffle assembly is arranged on the upper part of the first-level air distribution plate 2421 of the air separation. After being impacted by the high-pressure jet, the material will hit the three-layer baffle plates in turn, and then fall back to the first level of the air separation under the resistance of the baffle plates. The material is then impacted by the high-speed jet and the material is hit by the baffle plate 2421, and then hits the baffle plate again due to the action of the high-speed jet, repeating the process of impact, collision and falling. In this process, since the material fluidization speed is relatively large and the corresponding kinetic energy is relatively large, the effect on the material when it hits the baffle plate will also be relatively strong, so that the agglomerated materials that have not been successfully separated under the impact of the high-pressure jet can be separated under the strong impact, and this impact will be more obvious for particles with larger particle sizes. At the same time, the three layers of baffle plates are arranged in an inclined and staggered manner in sequence, and the particle size of the blocked material is smaller as it goes up, so as to prevent the material that has not been fully separated from being directly sucked away from the dust removal port. Due to the large impact of the microporous jet of the first-level air distribution plate 2421 and the resistance of the upper first-level air separation material baffle assembly, the movement of materials in this area will appear more chaotic and the uneven distribution of the material layer may be affected. Therefore, a first-level air separation rectifying grid 2422 is provided behind the first-level air distribution plate 2421, which can not only adjust the uniformity of the distribution of materials on the air distribution plate, but also, to a certain extent, change the mixing condition of the materials on the first-level air distribution plate 2421 so that the range of materials affected by the jet is wider.

[0081] When the material reaches the secondary air distribution plate 2431 of the air selection, it will also present a fluidized state under high-frequency excitation and microporous jet. However, due to the decrease in the speed of the microporous jet (the outlet jet speed is about 15-20m / s), the regularity of the movement will be significantly enhanced, basically presenting the form of a boiling fluidized bed. During the initial fluidization, it will present a state where the material is first thrown up by the microporous jet, then the large particles fall down, and the small particles are entrained by the air flow to form a discharge layer. As the fluidization state stabilizes, obvious stratification will appear. A secondary baffle plate assembly is also provided on the upper part of the secondary air distribution plate 2431 of the air selection. On the one hand, it can separate the agglomerated materials that cannot be separated within the area of ​​the primary air distribution plate 2421 of the air selection, and on the other hand, it can prevent the +0.5mm particle size material from being sucked away by the negative pressure of the dust removal port. However, due to the large distance between the secondary air distribution plate 2431 of the air selection and the secondary baffle plate assembly, and the decrease in the speed of the jet, the amount of material blocked by the secondary baffle plate assembly also decreases, so the setting density of the baffle plate is also reduced accordingly. A secondary air distribution plate 2431 is provided behind the secondary air distribution plate 2431, which is mainly used to enhance the uniformity of material layer distribution.

[0082] When reaching the third-level air distribution plate 2441 for air separation, the speed of the microporous jet will further decrease (the outlet jet speed is about 8-12m / s). The movement state of the material also shows that the coarse particles are concentrated in the lower part of the bed, while the fine particles are suspended in the upper part of the bed. As the material moves upward, the jet gradually weakens. The smaller the particle size of the material falls, the distance between the third-level distribution plate and the dust removal port is sufficient to allow the particles of +0.5mm size to fall. At the same time, the dust removal port adopts a slight negative pressure, which can transport the -0.5mm size material to the dust removal system for recovery. The coarse particles that fall on the third-level air distribution plate 2441 for air separation continue to move forward under the action of the vibration motor, and are recovered from the coarse particle discharge port (air separation discharge port 203) after passing through the air separation discharge conveyor plate 2442.

[0083] The beneficial effects of the present invention mainly include: the sintering wet light and fine fuel sorting device proposed in the present invention can reduce the proportion of -0.5mm (less than 0.5mm) particle size fuel in the sintering fuel according to the process requirements, improve the fuel utilization efficiency and sintering production indicators, and reduce the solid energy consumption of the sintering production work flow; the sintering wet light and fine fuel sorting device proposed in the present invention realizes the sorting of wet light and fine fuel through the sorting principles of strong dispersion of agglomerated materials, fluidized stratification, and precise grading. Compared with traditional sorting devices, it has the advantages of good separation effect, high sorting efficiency, and low system energy consumption.

[0084] Please refer to Figure 4 and Figure 5Furthermore, in step S22, a first sintering wet fuel screening system is used for air selection, and the first sintering wet fuel screening system includes a first sintering wet fuel screening device and a heater, and the heater is used to provide hot air for the sintering wet fuel screening device.

[0085] Furthermore, in step S23 , a second sintering wet fuel screening system is used for air separation, and the second sintering wet fuel screening system includes a second sintering wet fuel screening device 300 and a heater 400 , and the heater 400 is used to provide hot air for the second sintering wet fuel screening device 300 .

[0086] Furthermore, the first sintering wet fuel screening device 200 includes a first screening bulk material distribution unit 210, a first level screening unit 220, a first level screening unit 230, a first level screening unit 240 and a first wind hood 250 which are sequentially distributed along the conveying direction. The first screening bulk material distribution unit 210 has a first inclined downward conveying plate, a first vibrator is arranged on the back of the first inclined downward conveying plate, a first level hot air chamber is arranged at the bottom of the first level screening unit 220, a first level air selection baffle assembly is arranged at the top of the first level screening unit 220, a first level normal temperature chamber is arranged at the bottom of the first level screening unit 230, a first level baffle plate assembly is arranged at the top of the first level screening unit 230, a first level normal temperature chamber is arranged at the bottom of the first level screening unit 230, a first level normal temperature chamber is arranged at the bottom of the first level screening unit 230, and a powder selection blade assembly 260 is arranged on the top first wind hood 250 of the first level screening unit 240.

[0087] Please refer to Figure 6 Furthermore, the second sintering wet fuel screening device 300 includes a second screening bulk material distribution unit 210, a second first-level screening unit 220, a second second-level screening unit 330, a second third-level screening unit 340 and a second wind hood 350 which are sequentially distributed along the conveying direction, the second screening bulk material distribution unit 210 has a second inclined downward conveying plate, a second vibrator is arranged on the back of the second inclined downward conveying plate, a second first-level hot air chamber is arranged at the bottom of the second first-level screening unit 220, a second first-level air selection baffle assembly is arranged at the top of the second first-level screening unit 220, a second second-level normal temperature chamber is arranged at the bottom of the second second-level screening unit 330, a second second-level baffle plate assembly is arranged at the top of the second second-level screening unit 330, a second third-level normal temperature chamber is arranged at the bottom of the second second-level screening unit 330, and a grading impeller assembly 360 is arranged on the second wind hood 350 at the top of the second third-level screening unit 340.

[0088] The sintered wet fuel sorting method proposed in the present invention mainly focuses on wet fine-grained materials with a moisture content of 7-20% and a particle size distribution of 0-5 mm. The focus of the material classification is to solve the two key problems of rapid separation of agglomerated materials and precise control of classification boundaries in turn. In order to solve these two key problems, the present invention proposes a method for rapid separation of agglomerated materials based on the principles of high-speed jet impact and baffle impact, as well as a method for precise control of classification boundaries based on the principles of fluidized drying, fluidized stratification, planar spiral airflow, gravity classification, etc., and proposes a material movement enhancement method based on the principle of high-frequency excitation. The material will be subjected to a variety of different effects in turn during the classification process, and the purposes of material drying, agglomerated material dispersion, and precise classification are achieved. However, with the different classification boundaries, the means to solve the two key problems corresponding to the classification of wet fine-grained coal are also different, which is mainly determined by the minimum particle size that can be separated by the classification methods based on different principles under such material conditions. According to the results of experiments and surveys, the method of fully fluidizing and stratifying the material on the porous plate to achieve classification is more suitable for working conditions with a classification limit of more than 0.5mm, while for working conditions with a classification limit of less than 0.5mm, the methods based on plane spiral airflow or gravity classification require the moisture content of the material to be less than 5%, so the material needs to be dried before classification. The different classification methods corresponding to different classification limit conditions mean that the materials are subjected to different effects during the classification process, and the corresponding classification media are also different.

[0089] In the specific implementation, a thin layer of material is used, and the thickness of the material layer does not exceed 50mm. The thin layer of material can make the contact between the material and each function structure more comprehensive. In addition, a high-frequency resonance system will be introduced in the process of spreading the material to disperse the agglomerated materials formed by other external forces such as extrusion in the silo.

[0090] For the working condition of the classification particle size <0.5mm, in the classification process, at the first screening unit stage, the material is first fluidized and dried under the action of the microporous low-speed jet of the porous air distribution plate (the outlet jet velocity is about 8ˉ12m / s), and the drying medium is hot air, which reduces the moisture content of the wet material to about 5%. After the moisture content is reduced, at the first and second screening unit stages, there may still be agglomerated particles in the material, and it is necessary to introduce a microporous medium-speed jet (the outlet jet velocity is about 15ˉ20m / s) and a baffle impact to couple the two to disperse the agglomerated materials, and the sorting medium is normal temperature air. After the agglomerated materials are separated, they can be graded. The grading process mainly includes two stages: primary grading and secondary grading. The first stage adopts the fluidized stratification method. In the first and third screening unit stages, fluidization is carried out under the action of microporous low-speed jets (the outlet jet velocity is about 8-12m / s), and particles with a size of >1-1.5mm (the target particle size is required to be any value between 1 and 1.5mm) are concentrated in the lower part of the bed, and particles with a size of <1-1.5mm (the target particle size is required to be any value between 1 and 1.5mm) are concentrated in the upper part of the bed and enter the secondary grading system with negative pressure, thereby completing the primary grading of the material. The sorting medium is normal temperature air. The basic principle of secondary classification will also vary with the classification boundaries. When the classification particle size is <0.15mm, the secondary classification mainly adopts the classification method based on the plane spiral airflow, and when 0.15mm<classification particle size<0.5mm ((the target particle size is required to be any value between 1 and 1.5 mm)), the gravity classification method is adopted. After the secondary classification is completed, the air separation medium and fine particles are separated by the gas-solid separation method, and the entire sorting process is completed. The material will also be subjected to high-frequency excitation throughout the process, which not only ensures forward feeding, but also effectively promotes the fluidization, drying and classification of the material.

[0091] For wet materials with a grading size of ≥0.5mm, the precise control of the separation boundary mainly adopts the principle of density stratification after the material is fully fluidized. After stratification, the grading particle size is controlled to be above 0.5mm by pressure control. Therefore, the whole process only needs one grading, and the sorting medium is all room temperature air. However, since the material is not dried, more powerful measures are needed to separate the agglomerated materials. The method used here is the coupling of microporous high-speed jet (exit jet velocity is about 30ˉ35m / s) and baffle impact to disperse the small particles adhering to the large particles. Secondly, the material is also subjected to microporous jet and baffle impact, but the outlet jet velocity will be reduced to 15ˉ20m / s. This is mainly to allow the large particles to be concentrated in the lower part of the bed, and the agglomerated fine particles can fully contact the baffle, and the agglomerated small particles can be separated in the repeated collision with the baffle. After separation, the material will enter the fluidization classification stage. The microporous jet wind speed is further reduced to 8-12m / s. The material presents a fluidized stratification state with large particles at the bottom and small particles at the top. The small particles at the top are carried away by negative pressure.

[0092] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for sorting sintering wet fuel, characterized in that: Includes steps: S10, obtaining an original wet fuel, wherein the moisture content of the original wet fuel is 7% to 20%, and the particle size of the original wet fuel is not greater than 5 mm; S20, if the classification particle size requirement is not less than 0.5 mm, proceed to step S21; If the grading particle size requirement is not greater than 0.15 mm, then go to step S22; if the grading particle size requirement is 0.15 to 0.5 mm, then go to step S23; Step S21 specifically includes: S211, preliminarily dispersing and evenly distributing materials during vibration conveying; S212, fluidizing and loosening materials during vibration conveying based on normal temperature wind; S213, breaking up agglomerated materials during vibration conveying based on normal temperature wind; S214, fluidizing and classifying materials during vibration conveying based on normal temperature wind; separating and obtaining materials not less than 0.5 mm as coarse materials 1, and performing gas-solid separation on materials less than 0.5 mm to obtain fine materials 1; Step S22 specifically includes: S221, preliminary dispersion and uniform distribution during vibration conveying; S222, fluidized drying based on hot air during vibration conveying; S223, fluidized dispersion based on normal temperature air during vibration conveying; S224, fluidized classification based on normal temperature air during vibration conveying; S225, secondary classification using a planar spiral airflow method, separating and obtaining materials not less than 0.15 mm as coarse material 2, and performing gas-solid separation on materials less than 0.15 mm to obtain fine material 2; Step S23 specifically includes: S231, preliminary dispersion and uniform distribution during vibration conveying; S232, fluidized drying based on hot air during vibration conveying; S233, fluidized dispersion based on normal temperature wind during vibration conveying; S234, fluidized classification based on normal temperature wind during vibration conveying; S334, secondary classification using gravity classification method to separate and obtain materials with a size of 0.15 to 0.5 mm as coarse material three, and perform gas-solid separation on materials less than 0.15 mm to obtain fine material three.

2. The sintering wet fuel separation method according to claim 1, characterized in that: The vibration frequency of vibration conveying is 800 to 1000 times / minute; the beating frequency of preliminary dispersion is 8000 to 10000 times / minute; the material thickness of uniform cloth is 30 to 50mm; the wind temperature of normal temperature wind is 20 to 30 degrees; the wind temperature of hot air is 60 to 80 degrees.

3. The sintering wet fuel separation method according to any one of claims 1 or 2, characterized in that: In step S21, a sintering wet fuel sorting system is used for air sorting, and the sintering wet fuel sorting system includes a sintering fuel sorting device. The sintering fuel sorting device comprises an air-selection feeding mechanism, an air-selection material distribution and sorting mechanism and an air-selection air supply mechanism, wherein the air-selection material distribution and sorting mechanism has an air-selection material inlet, an air-selection dust outlet and an air-selection discharge outlet, wherein the air-selection feeding mechanism is arranged at the input side of the air-selection material distribution and sorting mechanism, and the air-selection air supply mechanism is arranged between the air-selection material inlet and the air-selection discharge outlet, and the air-selection feeding mechanism is used to feed materials to the air-selection material inlet. The air separation material sorting mechanism includes an air separation air separation vibration conveying platform, an air separation vibration conveying platform, an air separation vibration driving mechanism, an air separation multi-stage sorting unit, an air separation hood and an air separation material scattering unit. The air separation vibration conveying platform is arranged on the air separation basic frame. The air separation vibration driving mechanism is used to drive the air separation vibration conveying platform to vibrate. The air separation multi-stage sorting unit is fixedly arranged on the air separation vibration conveying platform and is used to convey materials along with the vibration of the air separation vibration conveying platform. The air separation hood cover is arranged on the air separation basic frame and enclosed with the air separation multi-stage sorting unit to form an air separation working chamber. The air separation material inlet and the air separation dust outlet are respectively arranged At the upstream and downstream of the air separation hood, the air separation air supply mechanism is arranged below the air separation multi-stage sorting unit, the air separation air supply mechanism is used to supply air from the bottom of the air separation multi-stage sorting unit into the air separation working chamber, the air separation cloth breaking unit is used to drive the head of the air separation multi-stage sorting unit to vibrate so as to disperse the water-containing agglomerated materials at the head by vibration, the dispersed materials after vibration dispersion are vibrated and transported on the surface of the air separation multi-stage sorting unit and air-separated in the air separation working chamber, the air-separated dust materials are output through the air separation dust output port, and the air-separated particulate materials are output to the outside of the air separation working chamber through the tail of the air separation multi-stage sorting unit.

4. The sintering wet fuel separation method according to claim 3, characterized in that: The wind selection multi-stage sorting unit comprises a wind selection material scattering and feeding component, a wind selection primary sorting and feeding component, a wind selection secondary sorting and feeding component and a wind selection tertiary sorting and discharging component arranged in sequence along the conveying direction; the wind selection material scattering and feeding component, the wind selection primary sorting and feeding component, the wind selection secondary sorting and feeding component and the wind selection tertiary sorting and discharging component are all fixedly arranged on the wind selection vibration conveying platform; the wind selection material inlet is located above the wind selection material scattering and feeding component and at the input side of the wind selection material scattering and feeding component. The air separation cloth scattering unit includes an air separation cloth conveying plate and an air separation conveying scattering plate arranged in sequence along the conveying direction, the air separation material inlet is located above the air separation cloth conveying plate, the air separation conveying scattering plate is arranged downwardly inclined along the conveying direction between the air separation cloth conveying plate and the air separation secondary sorting and feeding assembly, and the air separation cloth scattering unit is used to drive the air separation conveying scattering plate to vibrate from the back side of the air separation conveying scattering plate.

5. The sintering wet fuel separation method according to claim 4, characterized in that: The first-level air distribution plate for air selection includes an air selection hood and an upper air selection plate and a lower air selection plate arranged at intervals in the height direction. The air selection hood is fixedly arranged between the upper air selection plate and the lower air selection plate. A plurality of the air selection hoods are arranged in an array. The wind selection hood comprises a coaxially arranged wind selection air inlet section, a wind selection frustum section and a wind selection annular section, the wind selection air inlet section is provided with an axially penetrating air inlet hole, the wind selection frustum section is provided with an annular uniform flow chamber arranged in an annular shape, the wind selection annular section is provided with an annular air outlet chamber, the top surface of the wind selection annular section is provided with an air outlet hole connected with the annular air outlet chamber, and a plurality of the air outlet holes are arranged at intervals along the circumference of the wind selection annular section, The air inlet hole, the annular uniform flow chamber and the circular ring air outlet chamber are connected to each other.

6. The sintering wet fuel separation method according to claim 4, characterized in that: The air-selection secondary sorting and feeding assembly comprises an air-selection secondary air distribution plate and an air-selection secondary rectifying grid arranged in sequence along the conveying direction, and the air-selection secondary rectifying grid is arranged between the air-selection secondary air distribution plate and the air-selection tertiary sorting and discharging assembly in a downwardly inclined manner along the conveying direction. The three-stage air separation and discharging assembly includes a three-stage air separation air distribution plate and an air separation discharging conveying plate which are sequentially arranged along the conveying direction. The air separation discharging conveying plate is located downstream of the three-stage air separation air distribution plate and extends out of the air separation working chamber.

7. The sintering wet fuel separation method according to claim 3, characterized in that: In step S22, a first sintering wet fuel screening system is used for air separation, and the first sintering wet fuel screening system includes a first sintering wet fuel screening device and a heater, and the heater is used to provide hot air to the sintering wet fuel screening device.

8. The sintering wet fuel separation method according to claim 7, characterized in that: In step S23, a second sintering wet fuel screening system is used for air separation, and the second sintering wet fuel screening system includes a second sintering wet fuel screening device and the heater, and the heater is used to provide hot air for the second sintering wet fuel screening device.

9. The sintering wet fuel separation method according to claim 8, characterized in that: The first sintered wet fuel screening device comprises a first screening bulk material distribution unit, a first primary screening unit, a first secondary screening unit, a first tertiary screening unit and a first wind hood which are sequentially distributed along the conveying direction. The first screening bulk material distribution unit has a first inclined downward conveying plate, and a first vibrator is arranged on the back of the first inclined downward conveying plate. The bottom of the first-level screening unit is provided with a first-level hot air chamber, and the top of the first-level screening unit is provided with a first-level air selection material blocking assembly. The first and second level normal temperature chambers are arranged at the bottom of the first and second level screening units, and the first and second level baffle plate assemblies are arranged at the top of the first and second level screening units. A first and third-stage constant temperature chamber is provided at the bottom of the first and second-stage screening unit, and a powder selection blade assembly is arranged on the first wind cover at the top of the first and third-stage screening unit.

10. The sintering wet fuel separation method according to claim 9, characterized in that: The second sintering wet fuel screening device comprises a second screening bulk material distribution unit, a second primary screening unit, a second secondary screening unit, a second tertiary screening unit and a second wind hood which are sequentially distributed along the conveying direction. The second screening bulk material distribution unit has a second downward inclined conveying plate, and a second vibrator is arranged on the back of the second downward inclined conveying plate. A second-level hot air chamber is provided at the bottom of the second-level screening unit, and a second-level air selection material blocking assembly is arranged at the top of the second-level screening unit. A second-level constant temperature chamber is provided at the bottom of the second-level screening unit, and a second-level baffle plate assembly is arranged at the top of the second-level screening unit. A second third-stage constant temperature chamber is provided at the bottom of the second second-stage screening unit, and a grading impeller assembly is arranged on the second wind shield at the top of the second third-stage screening unit.

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